Method for calculating micro dendritic growth in continuous casting solidification on basis of cellular automaton

Abstract

The invention provides a method for calculating micro dendritic growth in continuous casting solidification on basis of a cellular automaton, and relates to the technical field of micro dendritic growth process simulation. According to the method, improvement is carried out on the basis of an eight-cell capture model in the cellular automaton; aiming at problems in the eight-cell capture model, aright adjacent cell of a captured adjacent unit cell is set as an interface cell to be calculated, so as to solve solid phase rate increase and residual liquid phase concentration for the captured adjacent unit cell; when no problems exist, calculation is directly carried out through a dendritic growth model; and through judging whether the solid phase rate of the captured adjacent unit cell is greater than or equal to 0 or not, users can determine whether to convert the captured adjacent unit cell from the interface cell to a solid phase cell or not. According to the method, the capture manner of the eight-cell capture model is improved, so that the calculation process is easy to converge, the calculation efficiency is higher, the success rate is higher, and isometric crystals growing atpreferential directions are basically identical with set preferential angles.

Description

technical field [0001] The invention relates to the technical field of simulation of microscopic dendrite growth process, in particular to a method for calculating microscopic dendrite growth in continuous casting slab solidification based on cellular automata. Background technique [0002] The continuous casting slab solidifies in the form of microscopic dendrite growth, and the dendrite evolution process determines the performance of the solidification structure of the continuous casting slab. The traditional low-magnification corrosion technology to detect the dendrite morphology of continuous casting slabs can only evaluate the microstructure and properties at the end of solidification, but cannot evaluate the growing dendrites. It is not only time-consuming and laborious, but also cannot improve the properties of continuous casting slabs. Using computer simulation technology to establish a microscopic dendrite growth model, monitor the growth law of dendrites in real ti...

AI Technical Summary

Problems solved by technology

However, the eight-cell capture model of the cellular automata method is prone to non-physical results in the solid phase ratio and liquid phase solute concentration of the unit cells during the model calculation process, which leads to non-convergence in the subsequent calculation results, and different optimal growth in the calculation. When growing equiaxed crystals at an angle, there is a large deviation between the growth angle of equiaxed crystals and the set preferred growth angle

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